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IEC 60502 Cable

IEC 60502 Cable

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International Standard IEC 60502-1 from the International Electrotechnical Commission sets out the specification for power cables with extruded insulation with a voltage rating of 1kV to 30kV. This standard also covers their accessories. The cables must have an extruded solid insulation and may contain longitudinal water-blocking properties such as swellable tapes and powders if the installation conditions demand it.
 
Many of the cables manufactured in accordance with IEC 60502 are designed for local power distribution, and for power and auxiliary controls. Where additional mechanical protection is provided, the cables are suitable for installation in masonry and concrete. The water-blocking properties are important to prevent water ingress when used in wet conditions.
 
It should be noted that IEC 60502-2 excludes cables for special conditions such as those manufactured for use in overhead lines, mining, nuclear power plants, marine and submarine applications. Where this is the case, technical specifications refer to cables being manufactured ‘Generally to IEC 60502-2’.

This Standard is divided into the following parts:

Parts Voltage Rating
1 1kV to 3kV
2 6kV to 30kV
3 Reserved for future development
4 Test requirements on accessories for cables with a voltage rating from 6kV to 30kV

 

IEC60502 cable

Scope of IEC 60502-1

Part 1 of this international Standard specified the construction, dimensions and test requirements of cables with extruded solid insulation with a rated voltage ranging between 1kV and 3kV for fixed installations such as distribution networks or industrial installations. Some of the cables covered by IEC 60502 have flame spread-reducing or Low Smoke Zero Halogen (LSZH) properties when exposed to fire.

IEC 60502-1 Systems categories

Categories Operating conditions
A Systems in which any phase conductor that comes in contact with earth or an earth conductor is disconnected from the system within 1 minute
B Systems which, under fault conditions, are operated for a short time with one phase earthed (not exceeding 8hrs on any occasion and no more than 125hrs per annum)
C All systems which do not fall into category A or B

IEC 60502-1 Cable properties

Insulated compounds
Thermoplastic - intended for cables with voltage rating smaller or equal to 3kV
Polyvinly Chloride (PVC)
Thermosetting<strong< strong="">
Ethylene Propylene Rubber or similar (EPR or EPDM)
High modulus or hard grade ethylene propylene rubber (HEPR)
Cross-linked Polyethylene (XLPE)

 

Sheathing compounds
Thermoplastic
Polyvinyl Chloride (PVC)
Polyethylene (PE)
Halogen-Free
Elastomeric
Polychloroprene
Chlorosulphonated polyethylene
Polymers similar to above

 

Conductors
Class 1 or Class 2
Plain
Metal-coated annealed copper
Plain aluminium
Aluminium alloy
Class 5
Plain
Metal-coated copper according to IEC 60228

Some cables meeting the requirements of IEC 60502 benefit from armoured layers, making them able to withstand a higher degree of mechanical stress than comparative sized unarmoured cables. Various types of armour are specified, such as concentric copper wire screens and/or helically wound copper tape as required in the N2XCH cable.

International power cables

Eland Cables is a leading supplier of power cables to British, European and international standards, including IEC 60502. For technical support with your IEC standard cable requirements, contact our technical engineers who have vast experience with their designs, manufacture and testing.
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About Eland Cables

Established in 1975, Eland Cables is a supplier of power, data, instrumentation and control cables and cable accessories to the world's most demanding industries and to some of its most prestigious projects. Our reputation is built on an unswerving focus on quality, technical expertise and customer service.

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The Cable Lab® our in-house cable testing facility, is UKAS-accredited to ISO 17025, which is the single most important standard for calibration and testing laboratories around the world. Accreditation to this international standard demonstrates our laboratory's technical competence and the accuracy of its results.

For our customers, it means peace of mind. They can have full confidence in the quality of our products and can demonstrate due diligence in selecting their cable supplier.

Our customers can also rely on the Cable Lab's services for an independent, objective and comprehensive quality assessment of cables procured from third parties.

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